I have a 2005 545i and am getting a P0492 fault. I believe that the pipe is cracked that goes from the secondary injection pump to the valve on either side of the back of the engine. P0492 would lead me to believe the problem is on the drivers side. I can hear the pump come on when the engine is first started and believe that I can hear air leaking from the pipe. Has anyone replaced this pipe and is it possible to do it without removing the intake manifold. It is very tight where the pipes connect to the valves. If the intake needs to be removed, what gaskets will I need and what else should I consider replacing while I am at it.